the memory is not pure

[mickey]

int size;
size = ifile.tellg();

int size;
size = ifile.tellg();

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[marcel]

Querying the file pointer after you first open the file will return 0.

Try this:

ifile.seekg( -1, ios_base::end );

ifile.seekg( -1, ios_base::end );

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If this does not work, could you compare the size with the actual file size?

Regards